Amit Kapila 8d74fc96db Add a view to show the stats of subscription workers. ... This commit adds a new system view pg_stat_subscription_workers, that shows information about any errors which occur during the application of logical replication changes as well as during performing initial table synchronization. The subscription statistics entries are removed when the corresponding subscription is removed. It also adds an SQL function pg_stat_reset_subscription_worker() to reset single subscription errors. The contents of this view can be used by an upcoming patch that skips the particular transaction that conflicts with the existing data on the subscriber. This view can be extended in the future to track other xact related statistics like the number of xacts committed/aborted for subscription workers. Author: Masahiko Sawada Reviewed-by: Greg Nancarrow, Hou Zhijie, Tang Haiying, Vignesh C, Dilip Kumar, Takamichi Osumi, Amit Kapila Discussion: https://postgr.es/m/CAD21AoDeScrsHhLyEPYqN3sydg6PxAPVBboK=30xJfUVihNZDA@mail.gmail.com		2021-11-30 08:54:30 +05:30
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src	Add a view to show the stats of subscription workers.	2021-11-30 08:54:30 +05:30
KNOWN_BUGS
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TODO